The air pressure switch is a safety device which checks the fan is fully operational. It ensures that, if the fan fails within the boiler, there would not be a build up of noxious fumes with no means of diverting them out of the property. The printed circuit board monitors the air pressure switch to make sure it is fully operational, it will stop the appliance firing up if this key feature isn't functioning.
Fits Multiple Glow-worm Appliances
Technical specification
TypeAir Pressure SwitchManufacturer Model NoS202232Brand NameGlow-worm
Reviews
Glow-worm S202232 Air Pressure Switch Micron/Ultimate 100FF